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Parts for your 2013 Toyota Mark x-Camshaft sensor
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2013 Toyota Mark X Camshaft Sensor
Based on Toyota’s technical literature, the 2013 Toyota Mark X (GRX130 series, 4GR‑FSE 2.5L and 2GR‑FSE 3.5L V6) is fitted with camshaft position sensors. The Toyota Repair Manual for the GRX130 SFI system, the Electrical Wiring Diagram (EWD) for GRX13#, and Toyota’s Electronic Parts Catalogue (EPC) all show camshaft position sensors on both cylinder banks, used by the ECM to manage Dual VVT‑i and fuel injection timing.
On this Mark X, the camshaft sensor’s job is to tell the engine control module exactly where the camshafts are in their rotation. With that info, the ECM fine‑tunes valve timing and injection, keeping starts crisp, idle smooth, power on tap, and fuel use tidy. Because the 4GR‑FSE and 2GR‑FSE run Dual VVT‑i and D‑4S injection, accurate cam feedback is non‑negotiable.
These sensors aren’t a scheduled service item, but they do benefit from a bit of attention during routine servicing. Under the bonnet, a quick look over the connectors and harness routing on the fronts of the cylinder heads can catch oil weeps or brittle wiring early. Fresh, correct‑grade engine oil also helps the VVT system behave and reduces the chance of sludge affecting timing feedback.
- Common signs of a crook cam sensor: longer cranking, rough idle, flat spots, poorer fuel economy, and a Check Engine light (often codes like P0340/P0345).
- Likely locations: one sensor on each cylinder head (Bank 1 and Bank 2), near the timing cover area.
If a sensor needs replacing, it’s a straightforward spanner job for most DIYers, but take your time:
- Ignition off and battery negative disconnected.
- Unplug the sensor connector, check for oil in the plug and pin damage.
- Remove the retaining bolt, twist the sensor gently to free the O‑ring, and withdraw.
- Lightly oil a new O‑ring, install the new sensor squarely, and refit the bolt to snug tight (do not overtighten).
- Reconnect, clear any fault codes, and road test. No special relearn is normally required, the ECM adapts after a short drive.
Use quality genuine or reputable aftermarket sensors, and if faults persist, inspect the wiring back to the ECM before blaming the new part. For anyone not keen on troubleshooting with a scan tool, a trusted workshop in NZ or Australia can test live cam/crank signals and confirm the fix without guesswork.
How many camshaft sensors does a 2013 Mark X have?
The V6 Mark X uses two camshaft position sensors, one for each bank. They provide the ECM with precise cam angle data to control Dual VVT‑i and fuel delivery.
Where is the camshaft sensor located on the Mark X?
Each sensor sits on the front end of its cylinder head, near the timing cover area. Look for a small, barrel‑shaped sensor with a single bolt and a two‑ or three‑pin connector.
Do camshaft sensors need regular replacement?
No set interval. Replace on failure or if diagnostic testing shows a weak or intermittent signal. During regular servicing, inspect connectors, wiring, and oil leaks to prevent sensor issues.
